Shotgun shells?

Is there a place (site / link) that gives sizes of shotgun cartridges? Coming up in a local estate auction there are 25 or 30 measureing from ’ 0 ’ gauge to some that measure no more than a 16th of an inch. Just trying to ID these shells.
k hege

C.O.T.W. ??

You have mail, hopefully it will be of assistance to you.

The Introduction to Collecting Shotshells article on the IAA site as a table of known sizes. … shotshells

Along the same lines, does anyone have actual measurements for standard gauge and A and B gauges. I had this at one time and cannot locate.